package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
public class UserServiceImpl implements UserService {

    // 微信服务接口
    public static final String WX_LOGIN_URL = "https://api.weixin.qq.com/sns/jscode2session";
    @Autowired
    private WeChatProperties weChatProperties;
    @Autowired
    private UserMapper userMapper;

    /**
     * 微信登录
     * @param userLoginDTO
     * @return
     */
    @Override
    public User wxLogin(UserLoginDTO userLoginDTO) {

        //调用微信登录接口，获取openid
//        Map<String, String> map = new HashMap<>();
//        map.put("appid", weChatProperties.getAppid());
//        map.put("secret", weChatProperties.getSecret());
//        map.put("js_code", userLoginDTO.getCode());
//        map.put("grant_type", "authorization_code");
//        String json = HttpClientUtil.doGet(WX_LOGIN_URL, map);
//
//        JSONObject jsonObject = JSON.parseObject(json);
//        String openid = jsonObject.getString("openid");

        String openid = getOpenId(userLoginDTO.getCode());
        // 判断openid是否为空，如果为空则登录失败
        if (openid == null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        // 判断用户是否新用户
        User user = userMapper.getByOpenid(openid);

        // 如果是新用户，自动完成注册
        if (user == null){
            user = User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(user);
        }

        // 返回用户对象
        return user;
    }
    /**
     * 获取openid
     * @param code
     * @return
     */
    private String getOpenId(String code){
        Map<String,String> map = new HashMap<>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("js_code",code);
        map.put("grant_type","authorization_code");
        String json = HttpClientUtil.doGet(WX_LOGIN_URL,map);
        JSONObject jsonObject =JSON.parseObject(json);
        String openid = jsonObject.getString("openid");
        return openid;
    }
}
